Measured service telephone system



Jan. 30, 1940. E. FEIST ET AL MEASURED SERVICE TELEPHONE SYS'IEI Filed May 25, 1936 2 Sheets-Sheet 2 Ill //7l lll fT RUDOLF NEBELUNG ATTORNEY.

"Jan. 30, 1940; E. FEIST ET'AL MEASURED SERVICE TELEPHONE SYSTEM Filed May 25, 1936 '2 Sheets-Sheet 1 INVENTOR.

' ERICH F'EIST RUDOLF NEBELUNG I ATTORNEY.

Patented Jan. 30, 1940 UNITED STATES PATENT OFFICE MEASURED SERVICE TELEPHONE. SYSTEM Erich Feist, Berlin-Charlottenberg, and Rudolf Nebelung, Berlin-Siemensstadt, Germany, assignors to Siemens & Halske Aktiengesellschaft, Wernerwerk, Siemensstadt, near Berlin, Germany Application May 25, 1936, Serial No. 81,624 In Germany June 13, 1935 The present invention relates to a circuit arrangement for remote communication systems and more especially for telephone systems in which the necessary statements for the computation of fees are indicated on registering dewhich involve the transmission of an impulse.

train consisting of one or more impulses for the purpose of influencing the subscribers meters in the exchange, without substantially altering the connecting devices, the subscribers meters being omitted.

The invention consists in that after influencing the registering devices in a manner characterizing the calling line, a characteristic identifying-the calling line is registered a number of times corresponding to the number of fee units contained in the amount to be charged for the call.

An embodiment of the invention is repre-- sented in the drawings. Of these, Fig. 1 is a circuit diagram showing a subscribers station, switching equipment for extending calls therefrom, and a pair of registering devices for recording the fees to be charged for calls. Fig. 2

rep-resents one form of registering devicewhich,

is adapted to perforate a moving tape to record fees.

In order to make the diagram clearer'only those switching devices which are necessary for understanding the invention are shown. The switching operations according to the arrangement shown in Fig. l are as follows:

It will be assumed that a plurality of subscribers, for example, one hundred subscribers, are associated in the exchange with two, registering devices ZZl and ZZZ serving to denote the fees. The subscriber TN sets up a call inthe known way over the preselector VW, the first group selector IGW and additional connecting devices and lines (not shown). After removing the receiver at the calling station TN the call relay R, of which only the contact 4r is shown, ener sizes. This switches on the rotary magnet (not shown) of the preselector which in the known manner seeks out a first group selector. When such a group selector has been found the following testing circuit is established: earth, battery, wiper d of the preselector VW, contact 41',

windings II and I of relay T, wiper c of the. pre selector, resistance Wi3 in the group selector, contact 40!, and 670, windings II of relays A and B and earth. In this circuit relay T energizes in the preselector and relays A and B in the first group selector. Relay T at contacts It and 2t switches the speaking lead through, brings the. preselector to rest (by means not shown) and by closing contact 3t guards the free group selector against further seizure. A circuit is established over the subscribers loop in which relays A and B are maintained energized over their windings I. This circuit runs as follows: earth, winding I of,

relay B, Wiperb of the preselector, contact 2t, subscribers loop, contact It, wiper a of the preselector, winding I of relay A, batteryand earth.v

By the opening of contact 4a a short circuit over relay C previously existing is removed so that this relay can energize over resistance Wi3, winding of relay C, contact 67c, windings II of relays A and B and earth. Relay C closes its contact 50 and establishes a locking circuit for itself which is maintained throughout the whole duration of the call. In addition it opens contact I30.

The subscriber now commences to dial. After the first vertical step of the first group selector.

the off-normal contact 67c is opened, thus disconnecting the windings II of relays A and B;

When the first group selector, after hunting in the level to which it has been set, finds a further connecting device the following testing circuit is established: earth, contacts not shown, Windings II and I of relay P, wiper c of the, group 5.9-.

lector and battery potential in the. subsequently arranged free connecting device. Relay P by closing its contact Hip guards the free connecting device which has been found against further.

seizure and effects-the other known switching operations which are not represented such as the switching through of the speaking leads, bringing the first group selector to rest, etc. It will be assumed that the repeater for time-,zone-metering is arranged after the first group selector. This possesses switching devices which establish thedesiredv trafiic direction and the duration of the call in the known manner. By means of further switching devices a metering impulse train which contains a number of metering impulses corresponding to the zone and to the time taken is transmitted over the speaking leads to the final selector LGW at the end of the call.

When after terminating the call the calling subscriber replaces his receiver relays A and B deenergize. By the closing of contact 4a relay is short circuited so: that this relay deenergizes after a short time. The following circuit is then set up; earth, battery, windings II and I of relay Y, contacts I30 and I217, resistance WM, winding of relay AN and earth.

In this circuit relay AN energizes- Relay Y energizes after one of the selector switches associated with the registering devices is operated in connection with the calling line. The relay Y energizing in the above-mentioned circuit closes its contact 111 and thereby connects the third winding of relay P to the other speaking lead to which earth potential is applied in the subsequently arranged time-zone equipment so that relay P, whose winding I is short-circuited by the closing of contact Hy, is prevented from a premature release. By means of the battery potential applied to the upper speaking lead through contact 'ly the subsequent time-zone equipment is caused to transmit metering impulses whose number depends upon the value and the time of the call. The metering impulses are transmitted to the lower speaking lead and by way of wiper b of the first group selector pass to relay ZR to which earth potential is applied over contact 9y. Relay ZR is caused to energize and deenergize in rhythm with the metering impulses transmitted. Contact 8zr is thus opened and closed a number of times. Since, however, the contact closing are of only a short duration winding III of relay P does not deenergize. Only when relay ZR is energized for a protracted period at the end of the transmission of metering current and a short circuit is permanently established over winding III of relay P by contact 821' does this relay release.

By the closing of contacts lficm and Man the following circuits were established for relays Fl and F2, earth contacts 16cm and l5dl, winding of relay Fl, battery and earth, and earth, contacts Han, and l8d2, winding of relay F2, battery and earth. Relay Fl closes the following circuit for the rotary magnet Dl of the selector W'Dl cooperating with the'registering device ZZI: earth, battery, magnet Dl, contacts3l3fl and 34 9!, and earth, while during the closing of contact 36]2 the, following circuit is closed for the rotary magnet D2 of the selector W'DZ cooperating with the registering device ZZZ: earth, battery, rotary magnet D2, contacts 36 and 3'lp2, and earth. The rotary magnet DI advances the wiper al and bl of the selector WDI and the rotary magnet DZ advances wipers a2 and 222 of the selector WDZ by one step. Through the opening of the magnet contacts l5dl andv i862 the circuits set out above for relays Fl and F2 are broken and thus by. the opening of contacts 33fl and 36 2 the above-mentioned circuit for the rotary magnets DI and D2 are opened. This has the result that the contact l5dl and l8d2 are again closed and relays Fl and F2 are again operated. Thus the wipers al, bl and a2, b2 are advanced once more. This alternate play continues until one of the selectors has reached the contact which is connected to the wiper e of the preselector VW, of the calling subscriber TN. It will be assumed that the selector WDI cooperating with the registering device ZZI is the first to reach the preselector of the calling subscriber. The following circuit is then established: earth, windings II and I of relay Pl, relay Zl, wiper al of selector WDI, wiper e of the preselector VW, contacts l 2p, and I30, windingsI and II of relay Y, battery and earth. In this circuit relays Y and PI energize but not relay Zl. The relay AN arranged in parallel with relay Pl releases. The testing relay Pl of selector WDl closes its contact 22pl and thus completes a short-circuit for the highresistance winding -II of relay Pl so that the selector WD2 can no longer be set on the calling subscriber. Furthermore relay PI closes its coning of contact 302i.

tact. 28plandthereby prepares. a short-circuit for winding I of relay Ul. By opening contact 34pl any further influencing of the magnet DI of selector WDI and thus any consequent advancement is prevented.

If the case should occur in which the selector WD2 reaches the calling subscriber simultaneously with the selector WDl the following circuit is closed for the relay AB associated with selector WDZ: earth, contact ZGpl, wiper bl of selector WDI, wiper b2'of selector WD2, contact 35102, winding of relay AB, battery and earth. Relay AB. opens its contact 3Bab and thereby disconnects the testing relay P2 of selector WDZ. In

this case therefore, only the registering device ZZI is held in readiness.

It will be assumed that the calling subscriber has set up a highly-rated call for which several metering units have to be taken into account. As described above after the setting of the selector WDI connecting up the exchange meter ZZI, on the calling subscriber, a circuit was set up in which relay Pl was energized. Relay Zl which occurs in the same circuit still remains in the normal condition. Only when contact Mar is closed, i. e., when the first metering impulse has operated on the relay ZR. does an increase in current take place in the abovementioned circuit by the short circuiting of the high resistance winding I of relay Y. This increase in current causes relay Z! to energize. If contact l lzr is then again opened, relay Zl again releases. This results therefore, in the metering impulses being transmitted to the first group selector from the time-zone equipment. By the closing. of contact Zlal the following circuit is completed for the printing or stamping magnet SM: earth, contact Zlzl, magnet SM, battery and earth. The magnet energizes and stamps or prints on a movable paper strip a characteristic from which the number of the calling subscriber can be recognized (the details of this operation will be described later when describing the arrangement shown in 2).

By closing the contact 292! the following circuit made slow to act so that during the transmission U of the rapid succession of metering impulses the relay does not deenergize. If after the termination of the first metering impulse relay Zl falls back, the advancing magnet FM which after each metering impulse causes the paper strip to be advanced by a definite amount, is energized in the following circuit: earth, contact l9zl, 2011A, magnet FM, battery and earth. In addition the following circuit is established for relay Vl: earth, contacts 382! and Ellul windings I and H of. relay Vl, battery and earth. Relay VI closes its contacts 321;! and thus completes a short circuit for its winding I. This relay is therefore made slow in operation so that this relay also does not deenergize during the transmission of the metering impulses and the repeated open- When the second metering impulse becomes operative the stamping or printing of. the indication on the paper strip again takes place by the closing of contact Zlzl. Furthermore, on the second energizing of relay 2! the following circuit is established for the zone characterizing magnet Z0: earth, contacts 23zl, 'Mul, 250i, magnet Z0, battery, earth. The

magnet Z0 possesses two operating pins'of which one is displaced one step behind the other so that it provides the first characteristic of the calling subscriber which was printed or stamped on the paper strip with an additional zone indication (to be described in more detail in connection with the description of Fig. 2)., After the release of relay Zl, thatis after the termination of the second metering impulse, the paper strip is advanced again by the operation of magnet FM. Accordingly if, for example, five metering impulses are transmitted, the characteristic for the calling subscriber is represented five times on the paper strip with an additional characteristic whereby the call may be recognized as a zone call. As may be seen the zone magnet is only energized when several metering impulses are transmitted. If, for example, in the case of a local call, only a single metering impulse is transmitted the magnet Z0 is not operated and thus the additional indication does not take place.

When the last metering impulse is transmitted the relay ZR in the first group selector remains energized for a protracted period. On account of the continued closing of contact 821* relay P is caused to deenergize. This is the characteristic for the release of the connecting devices which have been taken into use. Since these are known operations which have no bearing on the present invention, they need not be described further.

If the selector WDZ cooperating with the exchange meter ZZ2 is the first to reach the calling.

subscriber the testing relay P2 of the selector WDZ would energize before the testing relay PI of selector WD! and would energize over wiper a2, contact 38ab, relay Z2 (which however does not immediately energize), windings I and II of relay P and earth. By opening contact 31102, relay P2 brings the selector WD2 to rest and prevents at contact 39172 the selector WDl from reaching the calling subscriber. Since when the circuit described above is established the relay 'AN which is arranged in parallel with relay P2 deenergizes, no further advance of selector WD! is possible.

The registration on the exchange meter 2Z2 takes place in the same manner as in the case of the exchange meter ZZI. The exchange meter ZZ2 is therefore only partly indicated. The auxiliary devices necessary for its operation correspond to those shown for the exchange meter ZZI.

For characterizing the calling subscriber a disc SCH of the nature of a stencil plate is provided, which around its margin carries the characteristics of the associated subscribers in the form of definite stamping combinations. When at the end of the call the magnet Di of selector W1)! is operated after the replacement of the receiver at the calling station the disc SCH associated with the wipersal and bl is advanced a step forward. As explained with reference to Fig. l the selector WDl is only brought to rest when the wiper al has reached the contact connected acterized. When the metering impulse train is transmitted the magnet SM receives the same number of impulses 'as the transmitted metering pressed against the disc SCH a corresponding number of times. The stamping combination determined by the disc is thereupon indicated on the paper strip PS as many times as there are impulses in the metering impulse train. After each stamping the paper strip is advanced. The corresponding advancing magnet is not shown in Fig. 2.

As was described in connection with the arrangement according to Fig. 1 only one impulse is transmitted in the case of local calls and a plurality of metering impulses are transmitted only in the case of expensive calls, i. e., zone calls. It was also described that the zone magnet was only operated on the second metering impulse The zone magnet ZO possesses two special stamp? ing pins STE, of which one is .displacedbehind the other by a distance equal to the distance by which the strip is advanced each time. In the case of local calls the stamping combination characterizing the calling subscriber is stamped on the paper strip only once without an addi tional indication being stamped by the magnet Z0. If, however, in the case of a more highly rated call several metering impulses are transmitted the stamping combination characterizing the calling subscriber is impressed on the first metering impulse and the paper strip is at the same time advanced one step forward. Onthe second metering impulse the same stamping combination is again impressed upon the paper strip, and in addition the two stamping pins ST2 are operated by the zone magnet Z0 so that both the stamping combination just impressed and also that previously impressed are provided with the zone characteristic. On the next metering impulse the stamping combination characterizing the called subscriber is again impressed and simultaneously the zone characteristic. The stamping pin STZ which is displaced one step backwards nowfalls into the previously punched aperture so that after the second metering impulse only one zone characterizing stamping is impressed on the paper strip.

If the paper strip PS indicated in plan in the lower part of Fig. 2 is considered it may be seen that the connection a was set up by a subscriber having the characteristic 1, 2, 4, 5, 6, and that this call was a zone call for which three -metering impulses had to be taken into account. The calls I), c, d, were local calls set up by subscribers with the characteristics 3, 5, and 2, 4, 5, and 5, 6. I What is claimed is: l

1. In a measured service telephone system, lines, a registering device, designations in said device corresponding to each of said lines, call charging means for transmitting one or more unit charges to said device in accordance with the value of a completed connection including a call ing one of said lines, and means for recording the designations of said calling line once for each unit charge transmitted to said device.

2. In a measured service telephone system,

lines, a registering device having designations for each of said lines, means for operating said registering device to select the designations corresponding to a. calling one of said lines, call charging means for transmitting one or more unit charges to said device in accordance with the value of a completed connection including a calling one of said lines, and means for recording,

the designations of said calling line once for eac unit charge transmitted to said device. 1

3. In a measured service telephone system, lines, a registering device having designations corresponding to each of said lines, means for completing a connection including a calling one of said lines, a selector switch associated with said device automatically selecting the calling line i when said connection is characterized as being chargeable, means responsive to the selective operation of said selector switch for operating said device to select the designations corresponding to the calling line, call charging means for transmitting one or more unit charges to said device in accordance with the value of the completed connection, and means for recording the designations of said calling line once for each unit charge transmitted to said device.

4. In a measured service telephone system as claimed in claim 2 including means for controlling the selecting operation of said device prior to the unit charge transmitting operations of said charging means.

5. In a measured service telephone system as claimed in claim 2 including means operative in response to the receipt of a release signal initiated by the calling line for controlling the selecting operation of said device.

6. In a measured service telephone system as claimed in claim 2 including means operative in response to the selective operation of said device for transmitting an impulse to said charging means to initiate the transmitting operation of said charging means. I '7. In a measured service telephone system as claimed in claim 2 including means controlled by said charging means for maintaining said registering device in its selected position.

' 8. In a measured service telephone system as claimed in claim 1 including means in said registering device operative in case higher value connections are completed, and additional designations recorded by said device in response to the 7 operation of said last means.

9. In a measured service telephone system as claimed in claim 1 including a switching device in said registering device corresponding to higher value connections, means for operating said switching device only in case a plurality of unit charges are transmitted by said charging means, and means controlled by said switching device for recording designations indicating high value connections.

10. In a measured service telephone system as claimed in claim 1 including a switching device in said registering device corresponding to higher value connections, means for operating said switching device only in response to the receipt of the second and all subsequent unit charges transmitted by said charging means, and means controlled by said switching device for recording designations indicating high value connections.

11. In a measured service telephone system as claimed in claim 1, including a recording strip on which said designations are recorded, and means for advancing said strip in response to each recording operation. 7

12. In a measured service telephone system as claimed in claim 1, including a switching device in said registering device corresponding to higher value connections, means for operating said switching device only in case a plurality of unit charges are transmitted by said charging means, means controlled by said switching device for recording designations indicating high value connections, a recording strip on which the calling line and high value connection designations are recorded, and means for advancing said strip in response to each recording of the calling line.

13. In a measured service telephone system, a plurality of lines, a plurality of registering devices common to said lines, designations in said devices corresponding to each of said lines, means for operating any one of said devices to select the designations corresponding to a calling one of said lines, call charging means for transmitting one or more unit charges to said device in accordance with the value of a completed connection including the calling line, and means for. recording the designations of said calling line once for each unit charge transmitted to said device.

14. In a measured service telephone system, lines, a registering device, designations in said device corresponding to each of said lines, call charging means for transmitting one or more unit charges to said device in accordance with the value of a completed connection including a calling one of said lines when the release of said connection is initiated, and means for recording the designations or said calling line once for each unit charge transmitted to said device.

15. In a measured service telephone system, lines, a registering device having designations for each of said lines, means for operating said registering device to select the designations corresponding to a calling one of said lines, call charging means for transmitting one or more unit charges to said device in accordance with the value of a completed connection including a calling one of said lines when the release of said connection is initiated, and means for recording the designations of said calling line once for each unit charge transmitted to said device.

16. In a measured service telephone system, lines, a registering device having designations corresponding to each of said lines, means for completing a connection including a calling one of said lines, a selector switch associated with said device automatically selecting the calling line when said connection is characterized as being chargeable, means responsive to the selective operation of said selector switch for operating said device to select the designations corresponding to the calling line, call charging means for transmitting one or more unit charges to said device in accordance with the value of the completed connection when the release of said connection is initiated, and means for recording the designations of said calling line once for each unit charge transmitted to said device.

17. In a measured service telephone system, a plurality of lines, a plurality of registering devices common to said lines, designations in said devices corresponding to each of said lines, means for operating any one of said devices to select the designations corresponding to a calling one of said lines, call charging means for transmitting one or more unit charges to said device in accordance with the value of a completed connection including the calling line when the release of said connection is initiated, and means for recording the designations of said calling line once for each unit charge transmitted to said device. I

ERICI-I FEIST. RUDOLF' NEBELUNG. 

